ToDo List of DAQ change

Currently the DAQ is running triple-coincident mode, and all triggers (T1,T2,T3,T4) are sent LHRS and RHRS to BigBite weldment to form T5 (which is T1&T3), by using RG8 long cables, and the Trigger Supervisor on a CAMAC crate in that weldment creates a L1A signal of T1~T7. Two long RG8 cables send the L1A signal back to two HRSs. L1A is retimed using strobe signals (S1.Or.S2) on both arms and the new RT signals are sent into their TM module to create ADC gate and TDC STOP signals.

To change the DAQ from triple mode into two independent DAQ, there are several works needed to be done:

1, Disconnect connections in between two HRSs and BB weldment. (by Zhihong)

2, Send T1,T2 of RHRS into its Trigger Supervisor to form a local L1A. Do exactly the same connection on LHRS to create its own L1A. (by Zhihong)

3, Set the delay values of two L1A signals by matching the strobe signals (or called retiming signals). In general, L1A has to be at least 30ns earlier than strobe signal. There two delay modules on each arm to delay L1A signals: Crate#1 Slot#20 for Right, and Crate#2 Slot#17 for Left.(by Zhihong)

4, After the retimed L1A creating ADC gates and TDC STOP, check that all ADC signals have to be in the gate. The width of ADC gate currently is set to 270ns and the ADC signals have to come at least 50ns later than the leading edge of the gate. TDC STOP by designing should be enough so we don't have to change anything on it. (by Zhihong)

5, TWO independent CODA running on two different adaq PC. (by Bob and Larry)

6, Complete scalers on RHRS and make sure all scalers on LHRS are working properly. (by David)